01.02 · Provisional page
TS-Optics TS102RED 0.8×
Focal reduction and field correction for the TS 102ED
The TS-Optics TS102RED performs two jobs in a single component. As a 0.8× reducer, it changes the OTA’s native 714 mm and f/7 configuration to approximately 571 mm and f/5.6, widening the captured field and bringing exposure time to about 64% of the original. As a flattener, it corrects field curvature so stars remain sharp towards the edges of the sensor. In the photograph it sits after the focuser and before the filter wheel and camera. It is designed for 100–102 mm f/7 ED and APO refractors and provides a corrected field up to 30 mm, suitable for APS-C sensors.
Optical train
Technical specifications
- Reference
- TS102RED
- Reduction factor
- 0.8×
- Resulting configuration
- Approx. 571 mm · f/5.6
- Exposure time
- Approx. 64% of the original time
- Compatible telescopes
- 100–102 mm f/7 ED and APO refractors
- Optical design
- Special glass optimised for improved sharpness
- Corrected field
- Up to 30 mm diameter · suitable for APS-C
- Telescope connection
- 2″ barrel with 2″ filter thread
- Camera connection
- Male T2 thread · M42 × 0.75
- Backfocus
- 55 mm from the T2 thread to the sensor
- Coating
- Multi-coated on every air-to-glass surface to reduce reflections and ghosting